Blame thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/driver/level2/zgbmv_k.c

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/*********************************************************************/
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/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/* All rights reserved.                                              */
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/*                                                                   */
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/* Redistribution and use in source and binary forms, with or        */
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/* without modification, are permitted provided that the following   */
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/* conditions are met:                                               */
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/*                                                                   */
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/*   1. Redistributions of source code must retain the above         */
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/*      copyright notice, this list of conditions and the following  */
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/*      disclaimer.                                                  */
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/*                                                                   */
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/*   2. Redistributions in binary form must reproduce the above      */
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/*      copyright notice, this list of conditions and the following  */
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/*      disclaimer in the documentation and/or other materials       */
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/*      provided with the distribution.                              */
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/*                                                                   */
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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
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/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */
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/*    INCLUDING, BUT  NOT LIMITED  TO, THE IMPLIED  WARRANTIES OF    */
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/*    MERCHANTABILITY  AND FITNESS FOR  A PARTICULAR  PURPOSE ARE    */
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/*    DISCLAIMED.  IN  NO EVENT SHALL THE UNIVERSITY  OF TEXAS AT    */
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/*    AUSTIN OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,    */
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/*    INCIDENTAL,  SPECIAL, EXEMPLARY,  OR  CONSEQUENTIAL DAMAGES    */
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/*    (INCLUDING, BUT  NOT LIMITED TO,  PROCUREMENT OF SUBSTITUTE    */
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/*    GOODS  OR  SERVICES; LOSS  OF  USE,  DATA,  OR PROFITS;  OR    */
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/*    BUSINESS INTERRUPTION) HOWEVER CAUSED  AND ON ANY THEORY OF    */
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/*    LIABILITY, WHETHER  IN CONTRACT, STRICT  LIABILITY, OR TORT    */
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/*    (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY WAY OUT    */
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/*    OF  THE  USE OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE    */
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/*    POSSIBILITY OF SUCH DAMAGE.                                    */
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/*                                                                   */
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/* The views and conclusions contained in the software and           */
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/* documentation are those of the authors and should not be          */
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/* interpreted as representing official policies, either expressed   */
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/* or implied, of The University of Texas at Austin.                 */
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/*********************************************************************/
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#include <stdio.h></stdio.h>
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#include <ctype.h></ctype.h>
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#include "common.h"
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#ifndef XCONJ
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#ifndef CONJ
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#define ZAXPY	AXPYU_K
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#define ZDOT	DOTU_K
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#else
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#define ZAXPY	AXPYC_K
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#define ZDOT	DOTC_K
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#endif
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#else
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#ifndef CONJ
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#define ZAXPY	AXPYU_K
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#define ZDOT	DOTC_K
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#else
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#define ZAXPY	AXPYC_K
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#define ZDOT	DOTU_K
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#endif
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#endif
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#ifndef TRANS
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#define M m
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#define N n
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#else
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#define N m
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#define M n
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#endif
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void CNAME(BLASLONG m, BLASLONG n, BLASLONG ku, BLASLONG kl, FLOAT alpha_r, FLOAT alpha_i,
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	  FLOAT *a, BLASLONG lda,
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	  FLOAT *x, BLASLONG incx, FLOAT *y, BLASLONG incy, void *buffer){
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  BLASLONG i, offset_u, offset_l, start, end, length;
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  FLOAT *X = x;
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  FLOAT *Y = y;
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  FLOAT *gemvbuffer = (FLOAT *)buffer;
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  FLOAT *bufferY    = gemvbuffer;
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  FLOAT *bufferX    = gemvbuffer;
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#ifdef TRANS
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  FLOAT _Complex temp;
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#endif
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  if (incy != 1) {
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    Y = bufferY;
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    bufferX    = (FLOAT *)(((BLASLONG)bufferY + M * sizeof(FLOAT) * 2 + 4095) & ~4095);
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    gemvbuffer = bufferX;
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    COPY_K(M, y, incy, Y, 1);
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  }
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  if (incx != 1) {
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    X = bufferX;
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    gemvbuffer = (FLOAT *)(((BLASLONG)bufferX + N * sizeof(FLOAT) * 2 + 4095) & ~4095);
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    COPY_K(N, x, incx, X, 1);
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  }
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  offset_u = ku;
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  offset_l = ku + m;
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  for (i = 0; i < MIN(n, m + ku); i++) {
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    start = MAX(offset_u, 0);
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    end   = MIN(offset_l, ku + kl + 1);
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    length  = end - start;
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#ifndef TRANS
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    ZAXPY(length, 0, 0,
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#ifndef XCONJ
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	  alpha_r * X[i * 2 + 0] - alpha_i * X[i * 2 + 1],
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	  alpha_i * X[i * 2 + 0] + alpha_r * X[i * 2 + 1],
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#else
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	  alpha_r * X[i * 2 + 0] + alpha_i * X[i * 2 + 1],
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	  alpha_i * X[i * 2 + 0] - alpha_r * X[i * 2 + 1],
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#endif
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	  a + start * 2, 1, Y + (start - offset_u) * 2, 1, NULL, 0);
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#else
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#ifndef XCONJ
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    temp = ZDOT(length, a + start * 2, 1, X + (start - offset_u) * 2, 1);
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#else
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    temp = ZDOT(length, X + (start - offset_u) * 2, 1, a + start * 2, 1);
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#endif
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#if !defined(XCONJ) || !defined(CONJ)
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    Y[i * 2 + 0] += alpha_r * CREAL(temp) - alpha_i * CIMAG(temp);
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    Y[i * 2 + 1] += alpha_i * CREAL(temp) + alpha_r * CIMAG(temp);
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#else
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    Y[i * 2 + 0] += alpha_r * CREAL(temp) + alpha_i * CIMAG(temp);
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    Y[i * 2 + 1] += alpha_i * CREAL(temp) - alpha_r * CIMAG(temp);
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#endif
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#endif
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    offset_u --;
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    offset_l --;
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    a += lda * 2;
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  }
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  if (incy != 1) {
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    COPY_K(M, Y, 1, y, incy);
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  }
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  return;
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}
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